Fix a top cause of slow queries in PostgreSQL (no slow query log needed)

Learn how to diagnose and fix a top cause of slow queries in PostgreSQL. Walk through a concrete scenario that illustrates how sluggish database performance can be caused by missing foreign key indexes and cascading deletes. See a real simulation with query execution times, and use the provided code to run the simulation yourself. Learn how proper indexing can boost your PostgreSQL database speed dramatically. Ideal for developers optimizing slow queries in PostgreSQL databases.